Jesse l



(No Model.)

J. L. HINDS.

LAMP SOCKET.

No. 466,290. A y Patented Deo.29, 1891.

WITNEssEs:

, v NToR I y l I l] BY I /jgaf l, I V

/- ATTORNEY@ UNITED STATES- PATENT OFFICE.

JESSE L. HINDS, OF SYRACUSE, NEl/V YORK, ASSIGNOR TO THE ELECTRICENGINEERING AND SUPPLY COMPANY, OF SAME PLACE.

LAM P-socKl-zT.

SPECIFICATION forming part of Letters Patent N o. 466,290, datedDecember 29, 1891.

Y Application filed July 23,1891. Serial No. 400,500. (No model.)

To aZZ, whom it may concern:

Beit known that I, JESSE L. HINDs, of S yracuse, in the county ofOnondaga, in the State of New York, have invented new nand usefulImprovements in Lamp-Sockets, of which the following, taken inconnection with the accompanying drawings, is a full, clear, andexactdescription. n

My invention relates to improvements in sockets for incandescent lampsof the same -generalclass as shown in my pending applications, SerialNos. 400,498 and 400,499, filed conjointly herewith, and has for itsobject the production of astrong and durable device which iseconomicalin manufacture and durable and efficient in use.

To this end the invention consists, essentially, in an insulatorbase-plate, a bracket secured to the base-plate and-formed with alateral extension or arm having an angular opening therein, a nipplehaving one end formed of angular cross-section and adapted to enter saidopening in the lateral arm of the bracket, with'its other end adapted tobe se.- cured to thelamp for supporting the same, and to make contactwith the inner lamp-collar connected to one of the lamp-terminals, a

second bracket arranged at substantially right angles to the lformerbracket, a springarm supported. on the insulator-plate and formed with afree end adapted to make contact with the outer lamp-collar connected tothe other lamp-terminal, a cam for forcing said spring-arm into contactwith said collar, and a spindle connected to said 'cam with a lostmotion.

The invention furthermore consists in the detail construction andarrangement of the parts, all as hereinafter more particularlydescribed, and .pointedout in the claims.

In describing myinvention reference is had to the accompanying drawings,forming a part ofthis specification, in which like letters indicatecorresponding parts in all the views.

Figure l is a verticalsectional view of my improved invention. Fig. 2 isa topplan View of a portion of the adjacent extremity of the lampadapted to be secured to said socket. Fig. 3 is an elevation of thedetached inner parts of the lamp-socket, the lspring-arm being shown asin its position assumed when opening the circuit. Fig. 4 is an invertedplan view of the parts as shown at Fig. 3. Fig. 5 is a verticalsectional view taken gn line 5'5, Figgt.V Fig. 6 is a longitudinalsectional view of the top wall and the upper portion of the side wall ofthe outer frame of the lamp-socket. Figs. 7 and 8 are respectivelyisometric perspectives of the top and bottom sides of the insulatorbase-plate; and Figs. 9 l0, and 11 are isometric perspectives of thebracket for supporting the cam, the bracket for supporting the lamp andmaking contact with one of its terminals, and the spring for makingContact with the other lam p-terminal.

A'represents the outer shell of the lampsocket, consisting of thevertical or peripheral wall a and the top wall a', formed with adepending fiange a2, adapted to enter the upper extremity lof the sidewall a and be secured thereto by screwsa, having their shank secured tothe'iiange a? and their head passed through slots a4 in the wall a.

"B is the insulator-plate, composed, preferably, of porcelain, as thesame is extremely durable and not liable to become burned or charred bycontinued use. As best seen at Fig. 8, the under face ot theinsulatonbase is formed with recesses b, adapted to receive the innerends of the screws a3 for'supporting said plate in position,

The lamp-supporting bracket C consists of the vertical and lateral armsC C2, is secured at one extremity C to the insulator-base B, and isprovided at its opposite extremity with a nipple C3, preferablyscrew-threaded at its outward extremity lfor entering the screwthreadedsocket d in the upper face of the lamp and making contact with the innercollar or ring d of the lamp, connected at d? to one of thelamp-terminals.

The arm C of the lamp-supporting bracket C is adapted to support a screwE, to` which is attached one extremity of a wire e, (shown by dottedlines at Fig. 5,) which passes through the central opening ci of the4socket top wall, along a groove B in the top face of the insulator-plateB, and through a groove B3, extending upwardly from the outwardextremity of said groove.

As preferably constructed, the bracket C is of its greatest width at thepoint where the ICO screw is attached, thus forming a broadbearing forthe coiled end ofthe wire.

The upper endof the arm C of thebracket C is formed with a foot c,turned inwardly and secured to the base-plate by suitable clamps, asscrews c', having their shank engaged with said foot and their head witha depressed shoulder c2, Fig. 5, of a socket b', formed in the top faceof the insulator-plate B, as shown at Fig. 7.

The upper end Ctof the nipple Ci", which is preferably produced of aseparate piece of metal from that composing the bracket C, is formedangular in cross-section, as best seen at Figs. 5 and 10, and isinserted in a corresponding opening c4 in the laterally-extending andsubstantially-horizontal arm C2 of the bracket C, being secured inposition by swagiug said upper extremity C4 upon the top face of thebracket-arm C2. The outer collar di of the type of lamps adapted to besecured to this improved socket is connected at d4 to the otherlamp-terminal, and, as presently described, is engaged'by a spring F. Inorder to prevent contact of the bracket with said collar, which in somestyles of lamps is very close to the inner collar, the point of union ofthe bracketarms C and C2is formed with a corrugation or depression Thisstyle of bracket is particularly applicable and practical for use insockets of this description, as the broad base carrying thewire-supportingscrew preventscontact of the extremity of said wire withadjacent partsof the socketcharged bythe opposite wire. The corrugationc5 prevents contact of the bracket with the outer lamp-collar, and thesquare or angular extremity of the nipple C3 enables the same to bereadily secured to the bracket, and when properly swaged entirelyprevents said nipple from revolution, which would be permitted if saidextremity were screwed into position. Itis evident, however, that, ifdesired, the bracket C may be formed with two vertical arms C instead ofone, as illustrated.

G represents a second bracket disposed at substantially right anglestothe frame C, and its arm G is adapted to support the retaining-screw gfor the second or return wire g', adapted to pass through the centralopening 0,5 of the top wall of the outer case and the grooves B and B2,corresponding to the like grooves through which the wire c passes. Thisbracket- G is secured in position by means of screws g2, having theirshank engaged with the bracket and their head with the lower wall of asocket b2 in the top face of the insulator-base.

rlhe side of the bracket G adjacent to the bracket C is cut away at g5in order that there may be no liability of the adjacent faces of saidbrackets engaging each other, since the socket would thus becomeshort-eircuited.

G and G2 represent depending arms formed upon the bracket G and adaptedto support the opposite extremities of the spindle h for carrying thecam Il, adapted to force the spring F inte contact with the ring il uponthe lamp. The spring F is preferably formed U-shaped, with one arm`fmounted in a slot f in the bottom face of the insulator-base andinterposed between the adjacent faces of the bracket G and theinsulator-base in order that one of the screws which secures the bracketG to the base may also retain the spring in position.

The depending arm f2 of the spring F extends on the outside of thebracket-arm G and between lugs G: on said arm, adapted to prevent thespring from lateral movement. The opposite lug f3 of the U-shaped springis disposed in substantially ahorizontal plane,

being normally forced by its spring-tension into engagement with thecani H, and is formed with the depending arm f4 and the enlarged andsubstantially-horizontal engaging face f, adapted to make contact withthe ring d3 upon operation of the cam, and thus open the circuit fromthe socket through the lamp. This particularconstruction of spring isreadily produced from suitable sheet metal, as phosphor-bronze, at aminimum expense, and, as previously stated, the same screw which holdsthe cam-supporting bracket in position also serves to hold the spring inposition.

The cam Il is preferably formed with oppositely-arranged teeth 71,',adapted to cneounter the base ot the spring-arm f, and with lat sides h2for registering with said spring-arm when the circuit is broken. On theouter face of the cam His a slot h3, within which is movable a pin orlugprojecting from the spindle h and formed of less diameter than the widthof the slot, in order that the spindle and cam may be connected togetherwith a lost motion for effecting quick breaking of the circuit. Theouter extremity of the cam-spindle is formed with a lug h, adapted tobear against the inner wall of the bracket-arm G2, and with theprojecting end h, which enters an aperture t' in a hand-piece I andslightly projects beyond the depressed shoulder t" of a socket i?,formed n said handpiece, of greater width than the aperture L'. Theextreme end of the shaft his then upset upon this shoulder, and thehand-piece, which is formed of porcelain, is firmly held in position.

My improved switch will be readily perceived from the foregoingdescription and upon reference to the drawings, and it is evident thatthe same is simple, durable, and practical.

In my aforesaid applications, Serial Nos. 400,498 and 400,499, I haveshown a similar construction of spring F, bracket G, spindle 71., andhand-piece I to the one herein dcscribed; but it will be understood thatI do not herein claim the specific construction of said parts.

As the detail construction and arrangement of the parts of my inventionmay bc somewhat changed from that shown in the draw- IOO IIO

ings, I do not herein limit myself to their spe#v cie construction andarrangement; neither do I herein claim the means for securing thehand-piece to the spindle. y

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is- A l. The combination,with aninsulator-base, of a bracket G, having the depending end arms G G2 andthe central arm or lug G4, a terminal carried by the arm G4, a spindle journaled in the arms G and G2, a cam on the spindle, a spring F, havingone extremity disposed on the outside of the bracket-arm G and formedwith a foot engaged with said bracket, a laterally-extending arm f2' onsaid spring, having a projecting bearing-.face adapted to be forced bysaid cam into engagement with one to engage the other lamp-terminal, anda ter? of the lamp-terminals, a bracket C, having one extremity securedto the insulator-base and the other` provided with a nipple adaptedthe'screw g, depending arms G and G2 on the bracket G, aspring F, havingthe vertical arm f2 disposed on the outside of the bracket-arm G andformed with an inwardly-extending arm secured to the insulator-base, theyielding arm f3 on the spring, formed with a depressed engaging face f5,a cam'adapted to bear against the arm f2 and engage the face f5 with thelamp-terminal, and a spindle journaled in the bracket-arms G and G2 andconnected to said cam with a lost motion, substantially as set forth.

3. The combination,with the insulator-base, of a spring F, consisting ofthe arms ff2 and the arm 2 havin@1 the de ressed en alrinov 7 b b Z:

end f5, a bracket G, having lugs G2, a cam H, a spindle h. and alamp-supporting bracket C, provided with a projecting spindle,substantially as described. In testimony whereof II have hereunto signedmy name, in the presence of two attesting witnesses, at Syracuse, in thecounty of Onondaga, in the State of New York, this 19th dayv of June,1S91.

JESSE L. I-IINDS.

Witnesses:

' CLARK H. NORTON,

L. M. BAXTER.

